Wrench.



H. MUNSON & B. HAZELTINE.

WRBNGH.

APPLICATIQN FILED Murs, 191s.

1,106,672. Patented Aug. 11,1914,

mw www narran sra'rns rarnnr orrron.

HENRY MUNSON, OF GREAT FALLS, MONTANA, AND BENJAMIN HAZELTINE, 0F

onn'rnn rorn'r, Iowa.

VIRENCH.

incassa.

To @ZZ whomz't may concern Be it known that we, (1) HENRY MUN- sonT and (2) BENJAMIN HAznmiNn, citizens of the United States, and residing at (1) Great Falls and (2) Center Point, in the counties of (l) Cascade and (2) Linn and States of (1) Montana andrt2) Iowa, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

rllhis invention relates to certain new and useful improvements in wrenches, and relates more particularly to pipe -wrenches, the main objects of the invention being to simplify the construction, secure greater strength in proportion to the weight, and to lessen the cost or' manufacture.

A further object of the invention is to provide for adjustment of the spring usually employed in pipe-wrenches for the purpose of throwing the movable jaw forward, so as to make the action of said spring weaker or stronger, as may be desired.

Another and important object of the invention is to provide in a pipe-wrench a means for distributing the strain upon the yoke that carries the movablejaw, and for limiting the movement of said yoke upon its pivot.

With the above and other objects in view as will appear as the invention is hereinafter more fully described and claimed, the invention resides in the novel construction, cornbination, and arrangement of parts as will be later described, and a practical and preferable embodiment of the invention as practised by us is herein illustrated without however thereby intending to limit ourselves to the specific construction shown and described.

. In the drawings illustrating our invention, like numerals of reference will be employed for designating like parts throughout the different views, in which Figure 1, is a view in side elevation, of a pipe wrench in accordance with our invention, Fig. 2, is a central longitudinal sectional view of the same, Fig. 3, is a horizontal sectional view of the stationary jaw and a part of the wrench shank or handle, Fig. 4, is a perspective view of the wrench shank or handle and the stationary jaw, and Fig. 5, is a detached detail perspective view of the pivoted yoke that receives the shank of the movable jaw.

Specification of Letters Patent.

Application filed. March 3, 1913.

Patented Aug. 11, 19111. Serial No. 751,840.

In the illustrated embodiment of our invention, 10, designates the stationary jaw of the wrench, and 11 the movable jaw thereof. The said stationary jaw consists of a toothed face-block or body portion, and a shank 12, while the movable jaw 11 has its confronting face also toothed, and is carried on the outer end of a shank 14, generally rectangular in cross section and provided on opposite edges with the usual teeth 15 to engage with the teeth of the adjusting nut 16 in the usual manner.

The shank 12 of the stationary jaw is received between the forward ends of the two flat plates or bars 17 from which the handle of the wrench is formed, and is firmly secured as by a rivet 18, and is also held by a pin 19, which is of suflicient length to eX- tend at both ends beyond the sides of the handle, as clearly shown in Fig. L1. The shank 12 constitutes a spacing block for the forward end of the handle, and the bars 17 from which the handle is formed are also spaced apart at their inner ends by a block 20, and, at a point directly back of the shank 12 by a spacing-block or member 21. that is provided in its upper face with a plurality of seats 22, the function of which will more presently appear.

A yoke designated generally as 23 is pivotally mounted on the outer or forward end of the handle, and comprises spaced cheekpieces. connected together by a. strap 24, and also by a web 25, in the under face of which are seats 26, facing the open ends of the seats 22. In one of the seats 22, is received one end of a coil spring 27, the other end of said spring being received in the corresponding seat 26. The purpose of this spring, as is understood in connection with wrenches of this type is to throw the movable jaw forward so as to make it grip the pipe, and by providing a plurality of seats for the spring it may be moved toward or away from the fulcrum point so as to make its action weaker or stronger, as desired.

The yoke 23 is secured in position by a pivot-pin 28, which is entered through alining apertures 29 in the cheek-pieces of the yoke, and an aperture 30 extending through the bars 17 of the handle and the shank 12 of the stationary jaw. The yoke has a limited pivotal-movement on the handle, its backward movement to spread open the jaws being limited by ears 31 depending from the cheek-pieces of the yoke and which act as stops when they engage the inclined shoulders 32 on the rear faces of the jaw 10. The forward tilting of the yoke is limited by shoulders 33 engaging with the inclined faces 34 of the upper end of the jaw V10, and also by the somewhat hook-shaped yrear faces 35 of the stop-ears 31 engaging the projecting portionsof pin 19. Between the inclined faces or shoulders 32, 34 of the` then folded over, and the connecting mem-Y,

ber 25 securedin any suitable manner, such connection 25 in addition to its serving as a seat for the spring 27 as heretoforedescribed, also vactingV as a stay to hold the yoke against narrowing or spreading. This con'- structionv of yoke is much cheaper to provide than by casting the yoke, asV has heretofore been the general practice in connection with yokes for pipe wrenches. By extending the pin 19v on both sides ofthe handle, abutmeiits are provided against which the ears Vorv stops 3l engage at the sametimev that theV shoulders 33 of the yoke engage with the shoulders 34 of the stationary jaw, so that the movement of the yoke is positively arrested at two different points, and the Copies of this patent may he obtained for iive cents each, by addressing strain thus distributed so as to reduce to a 4f() minimum, the danger of breakage. By constructing the handle of two fiat bars as described, the construction is also materially simplified and cheapened, since machine work is reduced to a minimum.

HavingV fully described` our invention, what we claim is Y Y f ln a pipe wrench, a handle Vconsisting of parallel bars, spacing blocks between said bars, one of which has a plurality of edge 5 0 seats, a fixed jaw carried by the forward end of the'handle, and having side faces prof vided with .upper and lower shoulders, a yokepivotally mounted on the handle and havin curved cheekieces 'fitting thef55'.-

g P Y e curved seats of the' fixed jaw, shoulders coacting` with the' shoulders of said fixed 4laws, and a connecting web formedV on its inner face with seats confronting-and aliningwith kthose of said spacing block, a coil spring 670 supported in said'alined seats, saidyoke also having `parall'elstopV ears onV opposite sides of 'the` handle to engagev abutments Y projecting from opposite sides ofthe handle, and

parallel guide .lugs,an'd armovablejarw ad- V65 justably mounted on thefhandle and held l against lateral movement by said guide lugs.

In testimony. whereof we aliix our signa- Y tures in presencelof witnesses;

iiiiinrriliiuson.Y Y VBiaaniniigii iniZnLfriNE.

lVitnesses for Henry Munson: OLAVC. PEAnsoN,

LF. PIERCE. `Vsitnesses for Benjamin EDWARD K. DUHL, E'ii-IELYNV M, GRAU.

Hazeltine g l the Commissioner or Eateiits,`

Washington, D. C. 

